{"title":"Porous carbon adsorbent from cellulose acetate for efficient Hg<sup>0</sup> adsorption from coal-fired flue gas.","authors":"Xiaoyuan Qiu, Yunyi Ge, Xiao Zhang, Boxiong Shen","doi":"10.1007/s11356-025-35989-1","DOIUrl":null,"url":null,"abstract":"<p><p>The elemental mercury emitted from coal flue gas has caused serious harm to the ecological environment, and the development of high efficiency Hg<sup>0</sup> adsorbents has been a research hotspot. In this study, cellulose acetate derived carbon adsorbent was prepared by the combination of soft template and activation method, which realized the efficient removal of Hg<sup>0</sup> from coal flue gas. The mechanism of adsorption process was studied by FTIR, Hg-TPD and kinetic simulation. The results show that the soft template agent mainly constructed mesopores in the adsorbent, and the activator mainly constructed micropores. The synergistic effect of the two significantly enhanced the physical adsorption of Hg<sup>0</sup> by the adsorbent. In addition, cellulose acetate with high O/C (0.93) was used as a carbon source to promote the formation of a large number of C = O functional groups on the surface of the adsorbent, which is the main chemisorption site of Hg<sup>0</sup>. The adsorbent has a high mercury adsorption capacity, reached 3,800 μg/g.</p>","PeriodicalId":545,"journal":{"name":"Environmental Science and Pollution Research","volume":" ","pages":""},"PeriodicalIF":5.8000,"publicationDate":"2025-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Environmental Science and Pollution Research","FirstCategoryId":"93","ListUrlMain":"https://doi.org/10.1007/s11356-025-35989-1","RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"0","JCRName":"ENVIRONMENTAL SCIENCES","Score":null,"Total":0}
引用次数: 0
Abstract
The elemental mercury emitted from coal flue gas has caused serious harm to the ecological environment, and the development of high efficiency Hg0 adsorbents has been a research hotspot. In this study, cellulose acetate derived carbon adsorbent was prepared by the combination of soft template and activation method, which realized the efficient removal of Hg0 from coal flue gas. The mechanism of adsorption process was studied by FTIR, Hg-TPD and kinetic simulation. The results show that the soft template agent mainly constructed mesopores in the adsorbent, and the activator mainly constructed micropores. The synergistic effect of the two significantly enhanced the physical adsorption of Hg0 by the adsorbent. In addition, cellulose acetate with high O/C (0.93) was used as a carbon source to promote the formation of a large number of C = O functional groups on the surface of the adsorbent, which is the main chemisorption site of Hg0. The adsorbent has a high mercury adsorption capacity, reached 3,800 μg/g.
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